The word spotlessness is playable in Scrabble®, but 1 blank substituting for the letter 's' is required. Because it is longer than 7 letters, you would have to play off an existing word or do it in several moves.
Scrabble® Letter Score: 13
Highest Scoring Scrabble® Plays In The Letters spotlessness
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Seven Letter Word Alert: (21 words)
leptons, lessens, lessons, nestles, netless, onestep, openest, osselet, pentose, pestles, petless, poetess, possess, possets, poteens, sonless, spleens, stenose, stepson, toeless, topless